LG OLED77Z19LA - Page 23

Normal
voltage?
Check various voltages of
Power Board Board (Main)
(12V,20V)
No Video/
No audio
Check and
replace
MAIN B/D
Y
Replace Power
Board and repair
parts
N
End
Standard Repair Process
A. Video error
No video/ No audio
☞A9
Established
date
Revised date
2/18
Error
symptom
2
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